S3 2 



INDEX 



Variation, 336 



Ventral nerve cord, locust, *i4<D 

 Venus nicrccnaria, 223 

 Vertebrates, defined, 237 

 Vespa sp., *i84 

 Vespina, 183 

 Vinegar eel, *-jg 



Vineyards, insects injurious to, 462 

 Vision, mosaic, 131 

 Volvocinae, 40 

 Volvox, 35 



Vorticella, structure and habits, *3i 

 Vulpcs fulvits, 314 

 V. lagopus, 314 



Walrus, 318 

 Wapiti, 303 

 Wasps, 183 



digger, *i83 



Water bug, mouth-parts,* 145 

 Water-dog, 256 



moccasin, 269 



tiger, *i69 

 Wax-scale, 460 

 Weasel, 314 

 Web-worm, 484 

 Whale-oil soap, 417 

 Whales, 302 

 Wheat, joint-worm, 495 



straw-worm, 495 

 Wheel animalcules, 



White-ants, 159 

 Whitefish, 251 

 White-fly, 451 

 Wire-worms, 503 

 Wolf, * 3 2 4 

 Wolverine, 314 

 Wolves, 313 

 Woodchucks, 310 

 Wood-lice, 121 

 Woodpecker, *284 



Xenopsylla cheopus, 376 

 Xylina antennata, *432 

 X. grotei, 432 



Yaws, 357 



Yellow currant-fly, 470, *47i 



Yellow fever, cause, 365 

 commission, 373 

 and mosquitoes, 373 

 mosquito, *374 



Yellowjacket, *i84 



Zalopus calif ornianus, 318 

 Zamenis constrictor, 269 

 Zapodidse, 306 

 Zeuzera pyrina, 513 

 Zilla calif arnica, 

 Zooids, 64 

 Zoology, defined, 2 



